const int buttonPins[] = {3, 4};  // Array containing the pin numbers for the pushbuttons
const int numButtons = sizeof(buttonPins) / sizeof(buttonPins[0]); // Number of buttons
const int strikePin = 7;   // the number of the door strike control pin

// Variables
unsigned long lastActivationTime = 0; // time when the door strike was last activated
unsigned long lastLogTime = 0;        // last time the status was logged
bool isStrikeActive = false;          // current state of the door strike

void setup() {
  // Initialize the LED pin as an output:
  pinMode(LED_BUILTIN, OUTPUT);
  // Initialize the door strike pin as an output:
  pinMode(strikePin, OUTPUT);
  
  // Initialize each button pin as an input with an internal pull-up resistor:
  for (int i = 0; i < numButtons; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }

  // Ensure both the strike and LED are off initially
  digitalWrite(strikePin, LOW);
  digitalWrite(LED_BUILTIN, LOW);
  // Start serial communication
  Serial.begin(9600);
}

void loop() {
  unsigned long currentMillis = millis(); // get current time
  bool anyButtonPressed = false; // flag to track if any button is pressed

  // Check each button's state
  for (int i = 0; i < numButtons; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      anyButtonPressed = true;
      break; // Exit the loop if any button is pressed
    }
  }

  // Activate or maintain activation of the strike if any button is pressed
  if (anyButtonPressed) {
    if (!isStrikeActive) {
      digitalWrite(strikePin, HIGH); // turn on the door strike
      isStrikeActive = true;        // mark the strike as active
      lastActivationTime = currentMillis; // update the last activation time
      Serial.println("Strike Activated");
    }
    digitalWrite(LED_BUILTIN, HIGH); // turn on LED to indicate button is pressed
  } else {
    if (isStrikeActive && (currentMillis - lastActivationTime >= 5000)) {
      digitalWrite(strikePin, LOW); // turn off the door strike
      isStrikeActive = false;       // mark the strike as inactive
      Serial.println("Strike Deactivated");
    }
    digitalWrite(LED_BUILTIN, LOW); // turn off LED
  }

  // Log status every 3 seconds
  if (currentMillis - lastLogTime >= 3000) {
    lastLogTime = currentMillis; // update the last log time
    Serial.print("Time: ");
    Serial.print(currentMillis);
    Serial.print(" ms, Strike Status: ");
    Serial.println(isStrikeActive ? "Active" : "Inactive");
  }

  delay(100); // Reduce delay to improve responsiveness
}